Attachment for drill presses



. F. E. BEssLER ATTACHMENT FOR DRILL PRESSES Filed April 27, 1925 3 Sheets-SIheet 2 lWwf/a3 manici) MwsZ/f Y f mi,

F. E. BESSLER ATTACHMENT FOR DRILL PRESSES l Fild April 27. 1923 3 Sheets-Sheet 5 N f 2f V73 l l l l f7' g 7 J7 A n 7 2/ v fi/4Z fa@ ,gn/vento jZleJaZe t Patented Jan. 8, 1924.

FRANK E, BESSLE'R, or'AKRoN, IoHioi ATTACHMENT Fon DRILL rnnssns' Application filed: April 2 7,4

TKoy all whomv t mag/wwwa.: Y A

Bezit Vknown thatl, FRANK BnssLER; af citizen-,of the United States, residin @at Akron, in'thefcoimtyof Summit and btate of Ohio; have: inventedf-a new and use-ful Attachment Lforf Drill Presses, oW-hich the following is afspecication. n

The object "of this 'invention -is to provide a fs'impleqmeansjwhereby a drill' press may be transformed into a tappngmaChne.

It iswithin thefprovince of the disclosure to:fimprove-generally; and to. enhance the utility yofY devices. of that type to'whiehsA theinventonappertains: v

lith-thel above and other; obj eetSfin view, which; ywill appear'- as 'the description; proceeds, the invention; resides in the combinationi andi-arrangement 'of parts, andin the. details ct construction hereinafter described and claimed, it beingunderstood that, w-ithrf in. the; scope. o*- what; is claimed, changes in;f the precisewembodiment of: theinvention;V shown can be, made 'without departing from the spiritof thefinvention. n

vIn ther accompanying drawings.:-

F'gure 1 shcwsfinfside elevation, device v constructed: in accordance with v the: inven- Figure. 6 iS.-`a crossfseetin .on the. line offF-igure 2Q; Figures? isjav pla-n showing thefyupper end( ofthe-"screwand partswar riedl thereby.-

Thefnumeral; lndenotes alporton cii'"thef frame ofr a drill press, the frameembidyig a horizontal bearing 2 andfa--verticalybearingA 3,y the. bearing 3 containingl ag sleeve i145;

A- yoke 5 :f :is f secured at 6^:to the shearing and carries a standard 7 A standardfi8-=is-f disposed opposite 5to; ,the=standardf-7{ and; has a recess-.'QJ-receiving theuprightarml() of'A a bracket?l 11| having: an'v arched foot 12 st iaddled 'on the bearingtv 2 andfheljd thereon by set screws 14., Securingelements 15 unitegthe arm. 10 of thel bracket with the.v

standandwSias shOWn'inl'Figuref, the arm' 10v having elongatedl lslots 16- receiving the se'euring elements 15 and' permitting-:adjust- A; support 17- is locatedfbetweeng the standfI ardsi and Standyhas reduced? ends=l8 re-f ceivedy ing vertically-elongated slots `1 9* formed was. serialy No.- saine? part of. the drillpress, -isA .journaled for rotas i tionin the sleeve L The-upper(endofftheV f,

shaft,.2.4 entersfthe: tubular .screw 22.1 *They upper endet-the shaft 2,11-is provided: with ai proj ectionQG, received and held against rotation between thetngers 2810i: the i bloekfy or I core l97. heldl fixed?. in. the screw 22,:3fthef L' f screw 22jhavinga `recess 198 in itsfupper endlA A vsecuring element 99,3such as'a screw,;is.. connected., at. its lolwerf end to the shaftA ,241;v 80 and fismountedtoslide andrto, rotate injthe'f block 9,7, the' screw hav-ing a head '100,ffadaptf edY Ito. be Vreceived in @the recess 98k-- Latches 101 are:pivotedrat102fto the screw 22,..andf

havenger ieces103fortheir'manipulationi 85 The latches l()LengageY beneathz'the head 100 oftherlsorew-p99`whichtormsf part of the shaft y 2&Aandgholds the projection 9.6 o the shaft 241 between; the fingers -28 Ioff the bleek 19.7 the shaft 24 thus beingfheld i to thel screw 22,@ for *90 rotation withf thescrew.l andi for: longitudinal movementtherewith., y

A beveled. pinon 30 is located',betweenther4 'standards 7 and I8, .the shaft"2.4passingthrouglril thebeveled pinionl.,Av The beveled l pinionl constitutes a part of thedrill presS,. but, in the present embodimentof theinven-lV tion, the beveled pinion 30 is'not seicuredltoH the :Shaft 24. -A clutehxelement Slis attached to'- the lupperf'surface of: the hub, portionA of' '100 the beveled pinion 30,. The beveled pinion 30vmeshes intoabeveledlpinion 32 oniashaftfV 1 33journaledinthe bearing 2. Afsetcollar 34 is:y mounted on the shaft 33,;-andthisset collarVtogetherwith the hub ofthe .pinio'i1;32, .105 preventsthe shaft 33 from` moving'end'ti/"Vise inthe bearing2. The beveledpinion ,32 onv the 4shaft 33 meshes into abeveled pinion 35 having. a hub 36. A retainingfri'ng 3'?` isV e secured to theistandardsY 7fandj8, and, .-,cdff .110 operatingiwith `the hub 36 ofthe beveled;VTV pinionA 3 5, retains the beveledA p iiiionf;` for 35. To the lower end of the clutch sleeve 39 a clutch 40 is secured as shown at 41. A key 42 is mounted in the clutch sleeve 39,

the'ends of the key engaging the ends of= the'sleeve. The key 42 is received slidably in the key-way 26 of the shaft 24, and, thus, the clutch sleeve 39 is coupled to the shaft 24, forrotation with the shaft and for sliding movement longitudinally of the shaft. The clutch sleeve 39 `has an external circumscribing cam groove 44. The ends of the cam groove 44 run out flush with the outer surface of the sleeve, as clearly indicated by the reference numeral 45 in Figures 1 and 2.

A movable member 46, in the form of a pin, is mounted for sliding` movement in the standard 8 transversely of the standard, The-movable member or pin 46 has outstanding flanges 47. The movable member 46 is thrust toward theshaft 24 by a compression spring 48 located in the standard. 1A latch rod 49 is mounted for vertical sliding movement in the support 17 and in the standard 8, the latch rod carrying an adjustable collar 50 vdisposed labove the projection 23. A movable member 51 is mountl yed to slide in the standard 7, transversely of the standard, and is advanced by a sprii 48 of the sort hereinbefore described. latch rod 52 is mounted to slide vertically in the support 17 and in the standard 7.

' rThe latch rod 52 carries an adjustable collar 53 located below the projection 23 on the screw 22. The latch rod 49 is thrust downwardly by a spring 55, the latch rod 52 being thrust `upwardly by a spring 54, the springs being located beneath cover pieces 56 carried by the standards 7 and 8. The lower end of the latch rod 49 engages the upper edge of the pin 46, the latch rod 52having an offset arm 57, shown in Figu ure 3, the` arm 57 having an upstanding finger 58 cooperating with the lower edge of the movable member or pin 51.

Let it be supposed that the clutch 40 is engaged with the clutch element 31 on the beveled pinion 30. Then, when the shaft 33 is rotated, the beveled pinion 32 will rotate the beveled pinion 30, and, since the pinion 30 is connected to the shaft 24 by the clutch .40, the shaft 24 will be rotated, the shaft 24 moving downwardly, as it rotates, because the screw 22 is threaded into the support 17 Clearly, the operation above described will serve to carry downwardly, the tapping element (not shown) on the lower end of the shaft 24. Suppose, however, that the clutch 40 has been raised, until it cooperates with the clutch element 38 on the hub 36 of the beveled pinion 35. Then, when the shaft" 33 and the beveled pinion 32 are rotated, the

beveled pinion 35 will be rotated, reverse rotation will be imparted to the shaft 24, and

the shaft 24, together with the tappino element thereon, will be elevated, since, as ereinbefore mentioned, the screw 22 is threaded into the support 417.` If the pitch of the thread cut by the tapping element difers from. the thread of thescrew 22, the endj portions '18 ofthe support 17 will risefinv the slots 19, the springs 20 being compressed. It has been pointed out hereinbefore, that the clutch '40 is shifted to couple either the` beveled pinion 30 or the beveled pinion y35 to the shaft 24, thereby to secure a direct or a reverse rotation of the shaft 24. The

means for accomplishing this-result willi now be explained.

When the shaft 24 and the screw 22 arrive at a point adjacent to the `upper end of their travel, the projection 23 engages the collar y 50 on the latch pin 49 and elevates thelatch pin, so that the latch pin is no longer between the flanges 47 of the movable member or pin 46.v Thereupon, the movable member f in the cam groove `44, and, in this way, thek clutch member 40 will be engaged with the clutch member 31 of the beveled pinion 30.

When the clutch sleeve 39 arrives at the,` limit of its downward travel, the inner end of the movable member `46 rides out of the cam groove 44, at the upper end ofthe l cam groove, and rides upon the eXtreme outer surface of the sleeve 39, the movable member 46 being thrust backwardly or out wardly, into the position shown in Figure 2. The spring 55 now reasserts itself andy slides the latch rod 49 downwardly, the .f latch rod engaging between the 'flanges47 of kthe member 46, to hold the member 46" retracted, as shown in Figure 2 of the drawings.

Whenfthe shaft-24 and the screw 22ar-y rive adjacent to the limit of their downward travel,the projection 23iengages the collar 53 on the latch rod 52,. yand slides the latch rod downwardly, the finger 58 -offFigure -3 being disengaged from between the flanges 47 of the left handmovable member 51. Undersuch circumstances, the inner end of the movable memberv 51,' under the action of the corresponding spring 48, will move inv wardly, andv enter the cam groove 44of-.the

clutchv sleeve 39 at the upper end of the camy groove. When rotation is imparted vto the Cil clutch sleeve 39, from the shaft 24, by way of the key 42, the clutch sleeve 39 will be moved upwardly, and the clutch 40 will be engaged with the clutch 38 on the hub 36 of the beveled pinion 35. When the movable member 5l arrives at the lowerv end of the cam groove 44 in the clutch sleeve 39, the inner end of the said movable member rides out of thel cam groove, onto the eXtreme outer surface of the clutch sleeve, the movable member being thrust outwardly, into the position shown in Figure 2 of the drawings. Thereupon, the spring 54 reacts on the latch rod 52 and slides the latch rod 52 upwardly until the finger 58 of the latch rod engages between the flanges 47 of the movable member 51, as shown in Figure 3, the movable member, thus, being held retracted.

The set collars 53 and 50 may be moved, respectively, along the rod 52, and along the rod 49 for purposes of adjustment.

The latches 100 may be disengaged from beneath the head 100, thereby permitting the shaft 24 to move downwardly, the head being received in the recess 98, the projection 96 on the upper end of the shaft 24 being disengaged from between the fingers 28 of the core 97 of the screw 22. The shaft 24 thus is uncoupled from the screw 22, and the device may be run as an ordinary drill press.

Having thus described the invention, what is claimed is l. In a device of the class described, a frame; a first shaft journaled in the frame and movable longitudinally therein; means for establishing threaded connection between the first shaft and the frame; first pinions loose on the first shaft; a second shaft journaled in the frame; a pinion on the second shaft and meshingwith the first pinions; a clutch operating to connect either of the first pinions to the first shaft; and mechanism responsive to the rotation of the first shaft for actuating the clutch.

2. A device of the class described, constructed as set forth in claim 1 and further characterized by the fact that said means embodies a yieldably mounted support slidable in the frame.

3. In a device of the class described, a frame; a first shaft journaled on the frame and movable longitudinally therein; means for establishing threaded connection between the first shaft and the frame; first pinions loose 'on the first shaft; a second shaft journaled in the frame; a pinion on the second shaft and meshing with the first pinions; a clutch operating to connect either o-f the first pinions with the first shaft and having a cam groove, the clutch being splined to the shaft to slide therealong; members slidable in the frame; means for advancing said members one at a time to engage in the cam groove, the cam groove being shaped to retract said members one at a time; latches cooperating with said members tohold the same retracted; means responsive to the longitudinal movement of the first shaft to operate the latches.

4. In a device of the class described, a frame; a shaft journaled in the frame and slidable longitudinally therein; means for imparting longitudinal movement to the shaft when the shaft is rotated; driven elements loose on the shaft; means for rotat-l ing said elements simultaneously; a clutch splined to the shaft and having a cam groove, the clutch operating to connect either of said elements to the shaft; members slidable in the frame; means for advancing said members one at a time to engage in the cam groove, the cam groove being shaped to retract said members, one at a time; latches cooperating with the said members, tohold the same retracted; and means responsive to the longitudinal movement o-f the shaft for operating the latches.

5. In a device of the class described, a frame; a shaft journaled in the frame and slidable longitudinally therein; means for imparting longitudinal movement to the shaft when the same is rotated; driven elements loose on the shaft; means for rotating said elements simultaneously; a clutch operatmg to connect either of said elements to the shaft, the clutch being splined to the shaft to slide thereon; members movable in the frame and cooperating with the clutch to impart longitudinal movement to the clutch when the clutch is rotated, the clutch being shaped to retract said members; latches slidable on the frame and cooperating with the said members to hold the same retracted; means for advancing the said members; and cooperating elements on the latches, and carried by the shaft, for operating the latches.

6. A device of the class described constructed as set forth in claim 5, and further characterizedk by the fact that those lof the cooperating elements which are on the latches, are adjustable longitudinally of the latches, means being provided for holding the said elements in adjusted positions on the latches.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

FRANK E. BESSLER.

Witnesses:

JAMES R. THOMAS, O. J. SWINEHART. 

